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研究: PCSK9/LDLR通路介导姜黄素烟酸酯促进HepG2摄取脂质
引用本文:张彩平,孙少卫,龚勇珍,欧露,林丽美,郑兴,庹勤慧,雷小勇,廖端芳. 研究: PCSK9/LDLR通路介导姜黄素烟酸酯促进HepG2摄取脂质[J]. 生物化学与生物物理进展, 2015, 42(9): 825-832
作者姓名:张彩平  孙少卫  龚勇珍  欧露  林丽美  郑兴  庹勤慧  雷小勇  廖端芳
作者单位:南华大学医学院,衡阳 421001;南华大学药学与生物科学学院,衡阳 421001,湖南中医药大学干细胞中药调控与应用研究室,长沙 410208;南华大学药学与生物科学学院,衡阳 421001,湖南中医药大学干细胞中药调控与应用研究室,长沙 410208;湖南中医药大学中国-卢森堡中医药合作研究中心,长沙 410208,南华大学药学与生物科学学院,衡阳 421001,湖南中医药大学干细胞中药调控与应用研究室,长沙 410208,南华大学药学与生物科学学院,衡阳 421001,湖南中医药大学干细胞中药调控与应用研究室,长沙 410208;湖南中医药大学中国-卢森堡中医药合作研究中心,长沙 410208,南华大学药学与生物科学学院,衡阳 421001,湖南中医药大学干细胞中药调控与应用研究室,长沙 410208;湖南中医药大学中国-卢森堡中医药合作研究中心,长沙 410208
基金项目:国家自然科学基金项目( 31371161, 81173047),湖南省自然科学基金(2015JJ6077, 2014JJ1024),湖南省“十二五”药学重点学科项目( 2011年),南华大学“十二五”科技创新团队项目
摘    要:为研究PCSK9/LDLR通路介导姜黄素烟酸酯(CurTn)降低血浆低密度脂蛋白胆固醇(LDL-C),减少动脉内膜下脂质沉积的分子机制,用5、10、15 μmo/L姜黄素烟酸酯与25 mg/L LDL共孵育HepG2细胞24 h,分别采用油红O染色、胆固醇荧光定量试剂盒、DiI-LDL摄取检测细胞内胆固醇含量及LDL摄取情况,用逆转录定量聚合酶链反应(RT-Q-PCR)检测LDLR及SREBP2的mRNA表达,蛋白质印迹检测LDLR、SREBP2及PCSK9蛋白表达.随姜黄素烟酸酯作用浓度的增高细胞内脂滴显著增多,细胞内游离胆固醇(FC)、总胆固醇(TC)含量增高,细胞内胆固醇摄取增多;RT-Q-PCR和蛋白质印迹检测发现,与对照组(Control)比较,5、10、15 μmo/L 姜黄素烟酸酯处理组LDLR 蛋白表达增高,SREBP2 mRNA表达水平升高,PCSK9蛋白表达降低,但对LDLR mRNA及SREBP2 蛋白表达无影响.结果表明:姜黄素烟酸酯通过降低PCSK9、减少LDLR降解、升高LDLR蛋白表达,促进HepG2细胞胆摄取胆固醇.初步说明CurTn可能通过抑制PCSK9介导LDLR溶酶体降解,促进肝脏清除血浆LDL-C水平.

关 键 词:姜黄素烟酸酯(CurTn),低密度脂蛋白受体(LDLR),低密度脂蛋白(LDL),前蛋白转化酶枯草杆菌蛋白酶9型(PCSK9),胆固醇调节元件结合蛋白2型(SREBP2 )
收稿时间:2015-04-23
修稿时间:2015-06-30

Research: PCSK9/LDLR Pathway Mediates Curcumin Trinicotinate Promoting Lipid Uptake of HepG2
ZHANG Cai-Ping,SUN Shao-Wei,GONG Yong-Zhen,OU Lu,LIN Li-Mei,ZHENG Xi,TUO Qin-Hui,LEI Xiao-Yong and LIAO Duan-Fang. Research: PCSK9/LDLR Pathway Mediates Curcumin Trinicotinate Promoting Lipid Uptake of HepG2[J]. Progress In Biochemistry and Biophysics, 2015, 42(9): 825-832
Authors:ZHANG Cai-Ping  SUN Shao-Wei  GONG Yong-Zhen  OU Lu  LIN Li-Mei  ZHENG Xi  TUO Qin-Hui  LEI Xiao-Yong  LIAO Duan-Fang
Affiliation:Medical College, University of South China, Hengyang 421001, China;College of Pharmacy and Biological Sciences, University of South China, Hengyang 421001, China,Division of Stem Cell Regulation and Application, State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan(incubation), Hunan University of Chinese Medicine, Changsha 410208, China;College of Pharmacy and Biological Sciences, University of South China, Hengyang 421001, China,Division of Stem Cell Regulation and Application, State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan(incubation), Hunan University of Chinese Medicine, Changsha 410208, China; Sino-Luxembourg Cooperative Research Centre for Chinese Medicine, Hunan University of China, Medicine, Changsha 410208, China,College of Pharmacy and Biological Sciences, University of South China, Hengyang 421001, China,Division of Stem Cell Regulation and Application, State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan(incubation), Hunan University of Chinese Medicine, Changsha 410208, China,College of Pharmacy and Biological Sciences, University of South China, Hengyang 421001, China,Division of Stem Cell Regulation and Application, State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan(incubation), Hunan University of Chinese Medicine, Changsha 410208, China; Sino-Luxembourg Cooperative Research Centre for Chinese Medicine, Hunan University of China, Medicine, Changsha 410208, China,College of Pharmacy and Biological Sciences, University of South China, Hengyang 421001, China and Division of Stem Cell Regulation and Application, State Key Laboratory of Chinese Medicine Powder and Medicine Innovation in Hunan(incubation), Hunan University of Chinese Medicine, Changsha 410208, China; Sino-Luxembourg Cooperative Research Centre for Chinese Medicine, Hunan University of China, Medicine, Changsha 410208, China
Abstract:
Keywords:CurTn   LDLR   LDL   PCSK9   SREBP2
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